Cold throw and hot throw: how to compare your candles
The fragrance you notice when opening a candle and the fragrance you experience as it burns are two different observations. Giving each its own place in your notes makes comparisons more useful.
Two experiences, two sets of notes
Cold throw describes the fragrance perceived from an unlit candle. Hot throw describes the fragrance perceived while it burns. CandleScience uses these terms to separate the shopping impression from the burning experience. Read its hot throw guide ↗︎
For your own notes, separate strength from character. “I notice it easily” describes strength. “The floral note feels softer than expected” describes character. A candle can be strong and still miss your scent brief; a delicate candle may be exactly right for the concept.
Can I notice the fragrance in the intended setting? Does the fragrance still feel like the candle I wanted to create?
Keep the comparison fair
Decide on one comparison question before you begin. For example: “Which of these two rose fragrances suits this candle concept?” Use your documented, supplier-guided process for each test. Record any differences you could not control.
Keep a consistent observation sheet with these columns:
| Record | Why it belongs in your notes |
|---|---|
| Test code and date | Connects an observation to the correct candle. |
| Formula version | Distinguishes a revised recipe from the original. |
| Cure and test conditions | Shows whether two observations are comparable. |
| Scent character | Captures what you smell in plain language. |
| Perceived strength | Keeps intensity separate from preference. |
| Next question | Turns the observation into a specific next test. |
Use a modest scoring scale, such as “hard to notice,” “noticeable” and “prominent,” and define it before testing. A precise-looking score is not a substitute for descriptive notes.
Evaluate burn performance separately
A strong scent does not establish that a candle performs properly. CandleScience’s burn-test guidance evaluates the complete candle across its useful life and recommends settling the burn behaviour before judging hot throw. Read the full burn-test method ↗︎
Follow the instructions for your materials and candle type. Keep burning candles attended, on a suitable heat-resistant surface and away from combustible items, children and pets. The National Candle Association provides a useful candle safety reference ↗︎.
Keep the burn record and fragrance record as two pages in the same test file. This helps prevent enthusiasm for a scent from obscuring an unresolved candle-performance issue.
When a fragrance feels weaker than expected
Start by checking what you can verify: the actual ingredient weights, formula version, cure instructions and conditions of the comparison. CandleScience notes that adding more oil does not automatically improve hot throw; the overall candle system matters. See the technical discussion ↗︎
Write a short change request for the next trial rather than changing several things from memory. “Repeat the same formula and confirm the weighing record” is a useful first action when you do not yet know the cause.
If you need help from the supplier, send the product code, wax, wick, vessel dimensions, fragrance calculation basis and observations. A specific test record makes the conversation more useful than simply reporting that an oil is “not strong.”
Finish with a decision you can explain
At the end of a comparison, write one of three outcomes: continue developing, repeat with one documented change, or set aside for another concept. Add a sentence explaining why.
Keep notes on the alternatives too. An oil that did not fit a bright daytime collection might be worth revisiting for a warmer direction. Your growing record of trials is more valuable than trying to memorise every bottle.
Build your next shortlist in the candle fragrance collection, or start with the sample testing worksheet.
Judge fragrance character, perceived strength and burn performance separately, then bring the results together.
